Acetaminophen Adsorption on Carbon Materials from Citrus Waste

C – Journal of Carbon Research, Год журнала: 2024, Номер 10(2), С. 53 - 53

Опубликована: Июнь 8, 2024

Biochar and carbon adsorbents from citrus waste have been prepared by thermal chemical treatments; they used in the aqueous phase adsorption of acetaminophen (ACE) as a model emerging pollutant. These materials were fully characterized elemental analysis, X-ray fluorescence (TXRF), adsorption/desorption nitrogen, diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), point zero charge (pHpzc), scanning electron microscopy (SEM), thermogravimetric analyses (TGA/DTG/DTA). A magnetic adsorbent was obtained FeCl3 activation under an inert atmosphere, giving rise to best results ACE adsorption. Adsorption equilibrium data at 298, 318, 338 K fitted different models, corresponding fitting Redlich–Peterson model. The maximum capacity resulted 45 mg ACE·g−1 K. free energy values calculated, between −21.03 −23.00 kJ·mol−1 obtained; negative confirmed spontaneity process. enthalpy entropy process obtained, −6.4 49 J·mol−1·K−1, respectively, indicating slightly exothermic increase randomness solid–liquid interface upon adsorption, respectively. kinetics also studied, with Elovich being one that gave best-fitting results.

Язык: Английский

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Removal of Emerging Contaminants from Water by Using Carbon Materials Derived from Tingui Shells

Separations, Год журнала: 2024, Номер 11(7), С. 215 - 215

Опубликована: Июль 12, 2024

This study explored the adsorption of acetaminophen and caffeine using CO2-activated biochar (BT-CO2) hydrochar (HT-CO2) derived from Tingui shell biomass. The experimental data kinetic equilibrium tests were employed in batch fixed-bed systems. In system, a specific amount adsorbent was added to known volume solution, mixture agitated for set period allow occur. solution passed through column packed with adsorbent, allowing continuous adsorption. These systems pave way future research. findings revealed that HT-CO2 exhibited greater surface area higher presence oxygen-containing functional groups than BT-CO2. oxygen had notable impact on capacity adsorbents pharmaceutical substances. systems, BT-CO2 demonstrated maximum 221.4 mg g−1 162.7 caffeine, while capacities 383.2 189.7 caffeine. fixed bed configuration, displayed 82.2 45.60 predominant mechanisms involved removal identified as H-bonding π-π bonds. results underscore promising potential these carbons effective treating water contaminated residues, inspiring further exploration this field offering hope treatment by providing solid foundation research development.

Язык: Английский

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Adsorption of amoxicillin by chitosan and alginate biopolymers composite beads

Environmental Science and Pollution Research, Год журнала: 2024, Номер 31(54), С. 62930 - 62949

Опубликована: Окт. 28, 2024

Язык: Английский

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Comparison between produced Tingui biochar versus commercial Norit in the adsorption of acetaminophen and diclofenac: characterization, batch, and fixed bed system

Journal of Chemical Technology & Biotechnology, Год журнала: 2024, Номер unknown

Опубликована: Дек. 7, 2024

Abstract BACKGROUND In pressing environmental challenges, practical solutions to remove organic contaminants from water are paramount. This study undertook a crucial task of comparing two adsorbents: BT‐KOH, synthesized Tingui bark activated with potassium hydroxide, and Norit commercial carbon. The comparison was based on experimental data adsorption kinetics isotherm tests in batch fixed bed systems, targeting the removal acetaminophen diclofenac. Physico‐chemical characterization analyses materials were also conducted enhance comparison. RESULTS study's key finding superior performance BT‐KOH over removing maximum capacities for 357.7 mg g −1 226.3 Norit. For diclofenac, these values 250.6 220.9 superiority attributed BT‐KOH's larger specific surface area higher quantities oxygen‐containing functional groups. CONCLUSION result underscores importance considering physical–chemical composition quest more effective sustainable treatment methods. © 2024 Society Chemical Industry (SCI).

Язык: Английский

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Magnetic Composite Carbon from Microcrystalline Cellulose to Tackle Paracetamol Contamination: Kinetics, Mass Transfer, Equilibrium, and Thermodynamic Studies

Polymers, Год журнала: 2024, Номер 16(24), С. 3538 - 3538

Опубликована: Дек. 19, 2024

This study reported a one-spot preparation of magnetic composite carbon (MCC@Fe) from microcrystalline cellulose (MC). The pure was impregnated in iron (III) chloride solution and carbonized at 650 °C. MCC@Fe adsorbent underwent various characterization techniques. XRD identified nanostructured Fe3O4 particles with an average crystallite size 34.3 nm embedded the core subunits material. FESEM images indicated rough irregular surface, some cavities along its incorporating nanoparticles, while EDS analysis confirmed presence elements like Fe, C, O. Notably, combining thermal chemical treatments produces more pores high specific surface area (500.0 m2 g−1) compared to MC (1.5 m2/g). VSM properties (0.76 emu/g), Hydrophobic Index (HI) showed that hydrophobic (HI 1.395). adsorption studies consisted kinetic, mass transfer, equilibrium, thermodynamics studies. Kinetic paracetamol on proved be rapid, time necessary for covering 95% (t0.95) lower than 27 min following fractal-like pseudo-first-order model (FPFO). Liu’s isotherm most appropriate understanding equilibrium. Remarkably, maximum sorption capacity (Qmax) 34.78 mg g−1 45 ΔH° value (+27.00 kJ/mol) negative ΔG° values were consistent physisorption mechanism favorable process. Furthermore, transfer is governed by intraparticle diffusion model, being rate-limiting step when considering Biot number greater 100. research displayed single-route production inexpensive nano adsorbents capable efficiently eliminating aqueous environments.

Язык: Английский

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